Arithmetic & Mental Ability – KLEE 2025 3-Year LLB
Click an option to check your answer, or click View Answer. Exam held on 1 June 2025 · Paper code 19/2025/OL.
Which one of the following is not true?
- A. 805 is not a prime number
- B. 23 divides 805
- C. 37 divides 805
- D. 5, 7 and 23 are factors of 805
Answer: Option C
Explanation:
805 = 5 × 7 × 23. So 805 is not prime, 23 divides it, and 5, 7, 23 are its factors. 37 does not divide 805, so statement C is not true.
The square root of the number 10000000000 is
- A. 1000000
- B. 100000
- C. 10000
- D. 10000000
Answer: Option B
Explanation:
10000000000 = 10¹⁰, so its square root is 10⁵ = 100000.
A shop owner bought an item for Rs.24550. He sold the item for 20% loss. The selling price was
- A. Rs.20640
- B. Rs.18640
- C. Rs.19640
- D. Rs.19540
Answer: Option C
Explanation:
Selling price = 80% of 24550 = 0.8 × 24550 = Rs. 19640.
Arrange the numbers in the descending order : 3/11, 7/13, 9/19, 6/17
- A. 3/11, 9/19, 7/13, 6/17
- B. 7/13, 9/19, 6/17, 3/11
- C. 3/11, 7/13, 9/19, 6/17
- D. 3/11, 6/17, 7/13, 9/19
Answer: Option B
Explanation:
As decimals: 7/13 ≈ 0.538, 9/19 ≈ 0.474, 6/17 ≈ 0.353, 3/11 ≈ 0.273. Descending: 7/13, 9/19, 6/17, 3/11.
The sum of the first n numbers, is 1275. The value of n is equal to
- A. 50
- B. 45
- C. 55
- D. 60
Answer: Option A
Explanation:
Sum of first n numbers = n(n + 1)/2 = 1275 → n(n + 1) = 2550 = 50 × 51 → n = 50.
The total weight of 18 non-identical items is 1170 kg. One item of weight 82kg is removed from them. Then, the average weight of remaining items, is
- A. 58 kg
- B. 60 kg
- C. 62 kg
- D. 64 kg
Answer: Option D
Explanation:
Remaining weight = 1170 − 82 = 1088 kg for 17 items. Average = 1088 ÷ 17 = 64 kg.
In a triangle ABC, the lengths of sides AB and BC are 18 cm and 40 cm respectively. If the angle between these two sides is 90 degrees, the area of the triangle is
- A. 350 sq.cm
- B. 380 sq.cm
- C. 390 sq.cm
- D. 360 sq.cm
Answer: Option D
Explanation:
The 90° angle is between AB and BC, so they are base and height. Area = ½ × 18 × 40 = 360 sq.cm.
The least common multiple of the numbers 20, 15 and 45 is
- A. 180
- B. 480
- C. 420
- D. 560
Answer: Option A
Explanation:
20 = 2² × 5, 15 = 3 × 5, 45 = 3² × 5. LCM = 2² × 3² × 5 = 180.
A can do a work in 18 days. A and B both together can do the same work in 11 days. Then, in one day, B alone can do
- A. 13/198 part of the work
- B. 7/198 part of the work
- C. 15/198 part of the work
- D. 17/198 part of the work
Answer: Option B
Explanation:
B's one-day work = 1/11 − 1/18 = (18 − 11)/198 = 7/198.
Two friends A and B have decided to donate a sum of amount to a government school in the ratio 2 : 3. If B has donated Rs.120000, then the total amount donated by both A and B is
- A. Rs. 180000
- B. Rs. 190000
- C. Rs. 200000
- D. Rs. 220000
Answer: Option C
Explanation:
B's 3 parts = 120000, so 1 part = 40000. Total = 5 parts = Rs. 200000.